United Airlines flight UA1023, a Boeing 757-200 registered N19117, was operating from Boston Logan International Airport (LGU) to San Francisco International Airport (SFO) on the morning of Friday, October 30, when it aborted its landing on Runway 28R. Air traffic control had cleared the aircraft to land and warned the crew about wake turbulence from a Boeing 787 Dreamliner that had landed ahead of it, as well as a slight tailwind of five knots. ADS-B data showed the aircraft starting to climb at around 75 feet as the pilot initiated a go-around because of an unstable approach.
After the go-around, the crew climbed to 5,000 feet and reported 5,200 lbs of fuel remaining. The aircraft was cleared to land on Runway 28R a second time and touched down safely at 11:24 a.m. local time, about 14 minutes after the go-around. The flight carried 91 passengers and six crew members, and no injuries were reported.
Under U.S. rules for domestic flights, airlines must carry enough fuel to reach their destination and an alternate airport where required, plus a further 45 minutes of flying. The report notes that 5,200 lbs is close to the minimum threshold for a Boeing 757-200, although it is up to the pilots to decide whether to declare an emergency.